diff --git a/dashboard/src/ui.rs b/dashboard/src/ui.rs
index 7b9500d..fc8d6a3 100644
--- a/dashboard/src/ui.rs
+++ b/dashboard/src/ui.rs
@@ -46,11 +46,12 @@ pub fn apply_theme(app: &AppWindow, entities: &Vec<HassEntity>) {
         if entity.entity_id == "sensor.diyless_thermostat_3_ambient_light_level"
             && let Ok(illuminance) = entity.state.parse::<i32>()
         {
-            let color_scheme = if illuminance < 250 {
-                ColorScheme::Dark
-            } else {
-                ColorScheme::Light
-            };
+            let mut color_scheme = app.get_color_scheme();
+            if illuminance < 250 {
+                color_scheme = ColorScheme::Dark;
+            } else if illuminance > 300 {
+                color_scheme = ColorScheme::Light;
+            }
 
             app.set_color_scheme(color_scheme);
         }